A first-year and student council vice-president of Miryuuin Academy. Was bred in a royal family. After Shougo transferred into Miryuuin, Konoe calls her "a princess to the core." Rinka keeps the Student Council President in line and is shown to be very good at dancing. She is a more distant aloof character who has a tendency to be competitive.

Rinka later revealed that school director Genda asked her to find Shougo's sister so that he can have leverage when working for the Mikadono Group. Rinka used Sagara's phone when making a fake sister announcement and threaten the director. Shougo sooner found out her scheme by using Konoe's phone. Shougo volunteered himself to pretend to be her lover so that her engagement to the director's son would be invalid. However, she told her parents about Shougo and broken the engagement to be with him.